I decided the other day to go ahead and mount my bench grinder. Just before doing so, I started to install the wheels. During this, I realized that there was some axial Play in the shaft. I knew that there is a wave washer in the assembly so I expected some play, however when I placed an indicator on the end of the shaft I realized that the shaft did not return to its original position after shifting it to one side or the other. After taking a few measurements it looked to have about .013" backlash. At this point I decided to pop the motor apart and install another shim. I chose a shim that was .025". I am no motor or grinder expert, but most grinders and motors that I have disassembled usually have a slight bit of spring pressure on the wave washer, and the shim size seemed to achieve what I was looking for.

The grinder looks to have been taken apart before. I assume that someone either lost one of the shims, or since the shaft was bent the grinder would not spin with all the shims installed
After reassembly, I mounted the grinder to a cabinet that I have in the garage. It runs like a dream and I'm very excited to have it. In everything I have about $40 including paint, bearings, in the grinder itself.
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